Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thu sach » tu sach, thuat sach, thuoc sach
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
va triet » va thiet, va trien, ve triet
hieu ca » hieu cac, hieu cua, hieu va
sach ky » sac ky, sach y, sach ty
ca nam » cua nam, cai nam, ha nam
thu va » thuc va, thue va, tu va
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang x hoi. hieu ca nam thu va ((hanh lai) OR (hanh lam)) ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu ca nam thu va ((hanh lai) OR (hanh lam)) ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. hieu ca nam thu va ((hanh lai) OR (hanh lam)) ((cua triet) or (va triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu ca nam thu va ((hanh lai) OR (hanh lam)) ((cua triet) or (va triet))*.